1213022408 has 32 divisors (see below), whose sum is σ = 2459586360. Its totient is φ = 557521920.

The previous prime is 1213022407. The next prime is 1213022429. The reversal of 1213022408 is 8042203121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1109023204 + 103999204 = 33302^2 + 10198^2 .

It is not an unprimeable number, because it can be changed into a prime (1213022407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 866 + ... + 49262.

Almost surely, 2^1213022408 is an apocalyptic number.

It is an amenable number.

1213022408 is an abundant number, since it is smaller than the sum of its proper divisors (1246563952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213022408 is a wasteful number, since it uses less digits than its factorization.

1213022408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48657 (or 48653 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1213022408 is about 34828.4712268569. The cubic root of 1213022408 is about 1066.4887400272.

Adding to 1213022408 its reverse (8042203121), we get a palindrome (9255225529).

The spelling of 1213022408 in words is "one billion, two hundred thirteen million, twenty-two thousand, four hundred eight".